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Table 1 Characteristics of NICU surveillance data in 26 old/voluntary and 95 new/mandatory participants in NEO-KISS, year 2007

From: The step from a voluntary to a mandatory national nosocomial infection surveillance system: the influence on infection rates and surveillance effect

Parameter

Old/voluntary participants (N = 26, starting in NEO-KISS 1January 2000- December 2002)

New/mandatory participants (N = 95, starting in NEO-KISS January-December 2006)

p-valuea

NICU characteristics

   

Number of beds in the NICU, median

24

16

0.004

Number of VLBW infants year 2007, median

53

23

<0.001

Months of participation until December 2010, median

123

56

<0.001

Number VLBW infants

1527

2753

 

Birth weight (gram), mean

1100

1140

0.001

End of surveillance

   

Transfer before 1800 g

21.4%

13.10%

 

End of surveillance 1800 g

71.9%

80.0%

 

Died

6.7%

7.0%

 

Number VLBW infants according to birth weight groups (%)

< 500 g

52 (3.4%)

92 (3.3%)

 

1000-1499 g

615 (40.3%)

1012 (36.8%)

 

1000-1499 g

860 (56.3%)

1649 (59.9%)

 

Device utilization rates per 100 patient days (pooled mean)#

CVC

   

500-999 g

28.2

30.2

0.484

1000-1499 g

13.8

16.9

0.934

Tube

   

500-999 g

21.2

21.2

0.267

1000-1499 g

6.3

6.1

0.676

Healthcare associated infection rates per 1000 patient days (pooled mean)#

Primary BSI

   

500-999 g

6.5

5.2

0.023

1000-1499 g

3.1

3.2

0.964

Pneumonia

   

500-999 g

1.0

0.8

0.286

1000-1499 g

0.4

0.1

0.053

Device-associated infection rates per 1000 device days (pooled mean)#

CVC-BSI

   

500-999 g

11.4

9.4

0.011

1000-1499 g

7.7

6.9

0.150

Tube associated pneumonia

   

500-999 g

2.2

2.3

0.634

1000-1499 g

3.9

0.4

0.010

  1. NICU, neonatal intensive care unit; BSI, bloodstream infection; CVC-BSI, Central venous catheter-associated bloodstream infection; VLBW, very low birth weight; # Data for the birth weight group < 500 g are not shown because of the small number of VLBW infants in this group; a p-value, Wilcoxon test; b p-value, Chi square test.